-ic c-- ccc ccf cci cck cco ccp ccr ccs cfc cff cfi cfk cfo cfp cfr cfs ci- cic cif cii cik cio cip cir cis ckc cki cko cks co- coc cof coi cok coo cop cor cos cpc cpf cpi cpk cpo cpp cpr cps crc crf cri crk cro crp crr crs csc csf csi csk cso csp csr css fcc fcf fci fck fco fcp fcr fcs ffc fff ffi ffk ffo ffp ffr ffs fic fif fii fik fip fir fis fkc fkf fki fkk fkp foc fof foi fok foo fop for fos fpc fpi fpk fpo fpp fpr fps frc frf fri frk fro frp frr frs fsc fsf fsi fsk fso fsp fsr fss i-f icc icf ici ick ico icp icr ics ifc iff ifi ifo ifp ifr ifs iic iif iii iio iip iir iis ikc ikf iki ikk iko ikr iks io- ioc iof ioi ioo iop ior ios ipc ipf ipi ipo ipp ipr ips ir- irc irf iri irk iro irp irr irs is- isc isf isi isk iso isp isr iss kcc kci kck kcp kcr kcs kfc kff kfi kfo kfs kic kif kii kik kio kip kir kis kkc kki kkk kkp kkr kks koc kof koi kok koo kop kor kos kpc kpf kpi kpk kpo kpp kpr kps krc krf kri krk kro krp krr krs ksc ksf ksi ksk kso ksp ksr kss o-i oc- occ ocf oci ock oco ocp ocr ocs of- ofc off ofi ofo ofp ofr ofs oic oif oii oik oio oip oir ois okc oki okk oko okp okr oks oo- ooc oof ooi ook ooo oop oor oos op- opc opf opi opk opo opp opr ops or- orc orf ori ork oro orp orr ors os- osc osf osi osk oso osp osr oss p-p pcc pcf pci pck pco pcp pcr pcs pfc pff pfi pfk pfo pfp pfr pfs pic pif pii pik pio pip pir pis pkc pkf pki pko pkp pkr pks poc pof poi pok poo pop por pos ppc ppf ppi ppk ppo ppp ppr pps prc prf pri prk pro prp prr prs ps- psc psf psi psk pso psp psr pss rcc rcf rci rco rcp rcr rcs rfc rff rfi rfk rfo rfp rfr rfs ric rif rii rik rio rip rir ris rkc rkf rkk rko rkp rks roc rof roi rok roo rop ror ros rpc rpf rpi rpk rpo rpp rpr rps rrc rrf rri rrk rrp rrr rrs rsc rsf rsi rsk rso rsp rsr rss scc scf sci sck sco scp scr scs sfc sff sfi sfk sfo sfp sfr sfs sic sif sii sik sio sip sir sis sk- skc skf ski skk sko skp skr sks soc sof soi sok soo sop sor sos spc spf spi spk spo spp spr sps sr- src srf sri srk sro srp srr srs ss- ssc ssf ssi ssk sso ssp ssr sss